Roller shutter equipment, motor and brake device

Abstract

The invention discloses a roller shutter equipment, a motor and a brake device, The brake device is used for braking motor rotor. The brake device includes a permanent magnet and a magnetic conductor, one of the permanent magnet and the magnetic conductor is used for connecting the motor rotor and the other one is used for connecting the motor stator. The permanent magnet includes N magnetic poles, the magnetic conductor includes N slots, the brake device constitutes a N poles N slots structure, where N is an integer greater than 1. The brake device is applied to motor and roller shutter equipment, it realizes rapid braking, at the same time it can effectively reduce the vibration frequency of the motor and avoid the vibration frequency of the cover shell of the roller shutter equipment. It avoids resonance, ensures normal operation of the motor and reduces motor noise during operation.

1 . A brake device, which is used for braking a motor rotor, characterized in that the brake device comprises a permanent magnet and a magnetic conductor, wherein one of the permanent magnet and the magnetic conductor is configured to connect the motor rotor, and the other one is configured to connect a motor stator, the permanent magnet comprises N magnetic poles, the magnetic conductor comprises N slots arranged at circumferential interval, the brake device forms a N poles N slots structure, where N is an integer greater than 1. 
     
     
         2 . The brake device according to  claim 1 , characterized in that the permanent magnet is used to connect the motor rotor, the magnetic conductor is used to connect the motor stator, and the magnetic conductor surrounds the permanent magnet. 
     
     
         3 . The brake device according to  claim 2 , characterized in that the brake device is a 2-poles 2-slots structure, a space of long strip is defined within the magnetic conductor, the permanent magnet is installed in the middle of the space, two ends of the space define two slots. 
     
     
         4 . The brake device according to  claim 3 , characterized in that the space is a racetrack shape, the inner wall of the magnetic conductor around the space comprises two planes located on the opposite sides of the permanent magnet respectively and two surfaces connected the end of the two planes respectively, the length of each of the two planes is greater than the outer diameter of the permanent magnet, the positions of the two surfaces define the two slots. 
     
     
         5 . The brake device according to  claim 4 , characterized in that the middle of each plane is further depressed to form a curved surface, and the curved surface clearance fit with the peripheral surface of the permanent magnet to form an air gap. 
     
     
         6 . The brake device according to  claim 5 , characterized in that the curved surface is coaxial with the outer surface of the permanent magnet, and the air gap is in constant and uniform size. 
     
     
         7 . The brake device according to  claim 2 , characterized in that the brake device is a 2-poles 2-slots structure, the magnetic conductor comprises two magnetic conductive elements symmetrically arranged on opposite sides of the permanent magnet, each of the magnetic conductive elements is cylindrical, the motor rotor comprises a rotating shaft, and the axis of the magnetic conductive elements are parallel to the rotating shaft of the motor rotor. 
     
     
         8 . The brake device according to  claim 1 , characterized in that the permanent magnet is used to connect motor stator, the magnetic conductor is used to connect motor rotor, the brake device is a 2-poles 2-slots structure, the permanent magnet comprises two permanent magnet elements symmetrically arranged on opposite sides of the magnetic conductor, each of the permanent magnet element is cylindrical, the motor rotor comprises a rotating shaft, and the axis of each the permanent magnet elements is parallel to the rotating shaft of the motor rotor. 
     
     
         9 . The brake device according to  claim 1 , characterized in that the brake device is a N-poles N-slots structure, where N is an integer greater than  2 , the permanent magnet is fixed on the motor stator, including N magnetic poles arranged on the circumference, the magnetic conductor comprises a connection part fixed on a rotating shaft of the motor rotor and N magnetic conductive elements extending from the connection part, and the N magnetic conductive elements are arranged at circumferential interval to form N slots. 
     
     
         10 . The brake device according to  claim 9 , characterized in that the brake device is a 3-poles 3-slots structure, each of the magnetic conductive elements is in shape of strip extending radially from the connection part, and the slots are in shape of fan ring. 
     
     
         11 . The brake device according to  claim 9 , characterized in that characterized in that the brake device is a 4-poles 4-slots structure, the magnetic conductive element are fan-shaped, and the slots are U-shaped. 
     
     
         12 . The brake device according to  claim 1 , characterized that the magnetic conductor is made of an entire piece of magnetic conductive material or a plurality of silicon steel sheets. 
     
     
         13 . The brake device according to  claim 6 , characterized in that the brake device comprises a shell seat used to install the magnetic conductor, one of the inner walls of the shell seat and the outer wall of the magnetic conductor is provided with at least one bump, and the other one is corresponding provided with at least one groove, the bump is inserted into the groove and then the shell seat and the magnetic conductor are fixed. 
     
     
         14 . The brake device according to  claim 2 , characterized in that the brake device comprises a shell seat used to install the magnetic conductor, the shell seat and the motor stator are fixed, the connection position of shell seat and the motor stator is staggered with the connection position of the shell seat and the magnetic conductor. 
     
     
         15 . The brake device according to  claim 2 , characterized in that the permanent magnet is annular arranged on a sleeve, the motor rotor comprises a rotating shaft, and the sleeve is fixed on the rotating shaft. 
     
     
         16 . A motor, comprises a motor stator and a motor rotor rotated relative to the motor stator, characterized in that the motor comprises the brake device according to  claim 1 . 
     
     
         17 . The motor according to  claim 16 , characterized in that the motor rotor comprises at least one positioning magnetic ring, the positioning magnetic ring and the brake device are arranged at the opposite end of the motor rotor. 
     
     
         18 . A roller shutter equipment comprises a cover shell, a motor arranged on the cover shell and a curtain driven by the motor according to  claim 17 . 
     
     
         19 . The roller shutter equipment according to  claim 16 , characterized in that the motor is a tubular motor and the self-locking frequency of the brake device is less than 200 Hz.